Gymnasts who were molested by doctor Larry Nassar are stepping up their attack on legendary Olympic coaches Martha and Bela Karolyi, with a call for Texas' top prosecutor to take action. The athletes' attorneys say the Karolyis may have violated child protection statutes by not alerting authorities to concerns about Nassar in the summer of 2015 — more than a year before he was publicly unmasked as a predator who touched girls inappropriately under the guise of medical treatments.